AH291 Description
AH291 is a monolithic fan motor controller with Hall sensor’s capability. It contains two plementary open-collector drivers for motor’s coil driving, automatic lock shutdown and restart function relatively. To avoid coil burning, rotor-lock shutdown detection circuit shut down the output driver if the rotor is blocked and then the automatic recovery circuit will try to restart the motor.
AH291 Key Features
- On chip Hall sensor
- Rotor-locked shutdown
- Automatically restart
- Built-in Zener protection for output driver
- Operating voltage: 1.8V~5.75 V
- Output current: IO( AVE ) = 400 mA
- General Description
- Package: SIP-4L, SOT23-5L, SOT89-5L
- Pin Assignment
- Pin Descriptions